一旦

  • in case (sth happens)
  • if
  • once (sth happens, then…)
  • when
  • in a short time
  • in one day

Example sentences

  • 一旦遇到困难就想退缩。

    yīdàn yù dào kùn nan jiù xiǎng tuìsuō.

    Once the going gets tough, you want to back out

See also